I activated my net10 sim recently and got everything working on the phone (i.e. talk, text and mms). I used the APN settings from the net10sim website and updated my phone. Initially, I ran into some issues with the internet not working and was getting "Authentication for proxy server failed" error. So I removed the proxy server and it seems to have fixed that issue. As far as signal strength is concerned, I get all 4 bars but no 3G. I have data but it is currently on Edge. What's odd is that I see the data status indicator on the phone switch to 3G for just a fraction of a second and then flips back over to Edge. It's almost like the network is denying 3G on the phone. I'm not sure what's causing this issue. Does this have anything to do with the APN settings, or could it be the SIM card?